Duplex 2205 Socket Head Cap ScrewASTM A1082 · ASME B18.3 · Manufacturer, trader & exporter, India
UNS S32205 / S31803 · W.Nr 1.4462
A Duplex 2205 socket head cap screw is a screw with a cylindrical head and hexagon socket. ASTM A1082 (S32205) where specified; otherwise may be machined from ASTM A276 / A479 bar (UNS S32205), where applicable — finished requirements to the purchase specification or project drawing. Allen-type cap screws are used where the head must sit flush or space is tight.
- ASTM A1082
- ASME B18.3
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a Duplex 2205 Socket Head Cap Screw?
- What it is
- A screw with a cylindrical head and hexagon socket
- Finished spec
- ASTM A1082 (S32205) where specified
- Material / feedstock
- ASTM A276 / A479 bar (UNS S32205), where applicable
- Dimensions
- ASME B18.3 · ISO 4762 · DIN 912 (legacy DIN)
- Grade
- Duplex 2205 · UNS S32205
- Best at
- Strength with chloride resistance at a stainless-steel budget
Duplex 2205 Socket Head Cap Screw Specification
| Product | Duplex 2205 Socket Head Cap Screw |
|---|---|
| Finished fastener specification | ASTM A1082 (S32205) where specified |
| Material / feedstock specification | ASTM A276 / A479 bar (UNS S32205), where applicable |
| Dimensional standard | ASME B18.3 · ISO 4762 · DIN 912 (legacy DIN) |
| Manufacturing route | To the finished specification where specified; otherwise machining from bar, where applicable |
| Project / purchase specification | Yes — finished fastener requirements are to the purchase specification or project drawing |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI (as specified in the PO) · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 or 3.2 on request / as specified in the PO |
When to Choose a Socket Head Cap Screw
Allen-type cap screws are used where the head must sit flush or space is tight.
- Hex socket drive
- ASME B18.3 · DIN 912
- Metric and inch
More on choosing: Socket head cap screw guide.
Duplex 2205 Socket Head Cap Screw: Why 2205 for socket head cap screws
Allen-type cap screws are used where the head must sit flush or space is tight. In Duplex 2205, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Duplex fasteners add strength in chloride service. Duplex 2205 is picked for strength with chloride resistance at a stainless-steel budget. |
|---|---|
| Typical service | Oil & gas — Flowlines, manifolds and topside piping. |
| Bolting | B7 (coated), B8M or duplex studs, as the project specifies |
| Sour service | Listed in NACE MR0175 / ISO 15156-3 within its limits — state it on the order |
Duplex 2205 Socket Head Cap Screw Chemical Composition
Under technical review for TDS.
| Element | Current requirement |
|---|---|
| Chromium | As specified |
| Nickel | As specified |
| Molybdenum | As specified |
| Nitrogen | As specified |
| Carbon | As specified |
| Manganese | As specified |
| Silicon | As specified |
| Phosphorus | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification to be verified: ASTM A240 for UNS S32205.
Duplex 2205 Socket Head Cap Screw Mechanical Properties
Under technical review for TDS.
| Property | Current requirement |
|---|---|
| Tensile strength | As specified |
| Yield strength 0.2% | As specified |
| Elongation | As specified |
| Hardness | As specified |
Numerical specification requirements are published only after the applicable current standard edition has been verified. Governing specification and condition to be verified: ASTM A240 for UNS S32205 — Solution-annealed plate & sheet.
Full chemistry, properties and equivalents are on the Duplex 2205 grade page.
Standards on this page
Other Duplex 2205 fasteners
Duplex 2205 Socket Head Cap Screw — questions buyers ask
DIN 912 and ISO 4762 — are they the same?
Yes, ISO 4762 replaced DIN 912 with the same main dimensions.
What nut is used with Duplex 2205 socket head cap screws?
Usually a nut in the same alloy — it may be machined from ASTM A276 / A479 bar, where applicable; finished requirements are to the purchase specification or project drawing.
Which standard covers Duplex 2205 socket head cap screws?
Finished fastener specification: ASTM A1082 (S32205) where specified. Material / feedstock: ASTM A276 / A479 bar (UNS S32205), where applicable. Dimensions: ASME B18.3 · ISO 4762 · DIN 912 (legacy DIN). State the finished specification, material and dimensions on your purchase order or project drawing.
What decides the price of a Duplex 2205 socket head cap screw?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 or 3.2 certificates available on request / as specified in the PO; dimensional reports as required. PMI can be arranged depending on product and requirements, as specified in the PO.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026